How to mkdir in Firefox-Addon-sdk?

Question

How do I create a new directory/folder programatically? I'm downloading mp3s and saving them but I want to seperate them by genre (newDirectoryName). Here's my code so far..

function DownloadFile(sLocalFileName, newDirectoryName, sRemoteFileName)
{


    var saveToDirectory = 'C:\\Users\\louis\\downloads\\'+newDirectoryName+'\\';

    console.log("downloading : "+saveToDirectory);

    var chrome = require("chrome");

    var oIOService = chrome.Cc["@mozilla.org/network/io-service;1"].getService(chrome.Ci.nsIIOService)

    var oLocalFile = chrome.Cc["@mozilla.org/file/local;1"].createInstance(chrome.Ci.nsILocalFile);
    oLocalFile.initWithPath(saveToDirectory + sLocalFileName);

    var oDownloadObserver = {onDownloadComplete: function(nsIDownloader, nsresult, oFile) {console.log('download complete...')}};

    var oDownloader = chrome.Cc["@mozilla.org/network/downloader;1"].createInstance();
    oDownloader.QueryInterface(chrome.Ci.nsIDownloader);
    oDownloader.init(oDownloadObserver, oLocalFile);

    var oHttpChannel = oIOService.newChannel(sRemoteFileName, "", null);
    oHttpChannel.QueryInterface(chrome.Ci.nsIHttpChannel);
    oHttpChannel.asyncOpen(oDownloader, oLocalFile);    


    console.log("should be downloading!!!!");

}
DownloadFile('filename.mp3','genre','http://domain.com/file.mp3');

Answer 1

Import the OS.File module and use makeDir